Membership Information Our Members Members include civil, design and environmental engineers; biologists, chemists, local and state government officials, treatment plant managers and operators, laboratory technicians, students, professors, lawyers, environmental scientists, equipment manufacturers and distributors. Today the Association has over 2,400 members representing diverse backgrounds and specialties, but all are concerned and involved with protecting and enhancing our precious water resources. Membership Application Categories of Membership and Membership Costs Benefits of Membership